Chain-link.



PATENTED MAR. 17, 1908.

G. G. HOWE.

CHAIN LINK.

APPLIOATION FILED JUNE 26. 1905.

WITNESSES UNITED STATESPATENT OFFICE.

GLENN G. IIOWE, OF INDIANAPOLIS, INDIANA.

CHAIN-LINK.

Specification of Letters Patent.

Application filed June 26, 1905.

Patented March 17, 1908.

Serial No. 266969.

forming part ofthis specification, in which Figure 1 is a plan view ofmy invention partly in section, showing my preferred form ofconstruction; Fig. 2 is a transverse section; Fig. 3 is a similarsection, showing a modified construction, and Fig. 4 shows a furthermodification.

My invention consists in a cast metal chain, the side members of whichat one end are united by a tubular steel pin, the edges of which are notwelded together while the other link is constituted by members which areintegral with the side members and may be of a single piece. Thisconstruction affords a chain link which is very simple in itsconstruction and is strong, giving a good bearing surface for theadjacent link, so that chains thus constructed are very durable andeflicient.

'In the drawing Fig. 1 shows a chain link having side members 2, 2 whichare connected at one end by an integral hollow end member 3. The freeends of the side mem bers are connected by an interposed tubular steelpin the ends of which are inserted within the eyes at the ends of theside members and are preferably flush with the outer surface of the sidemembers. This pin is made by bending a piece of steel into tubularform,but without bringing its edges into welding contact, preferably leavinga slot 1) extending from end to end of the pin. This pin is preventedfrom rotation in the eyes of the side members by means of interiorprojections c in the latter, which fit within the ends of the slot, oras shown in Fig. 3 the eyes may be provided with slots and the pinprovided with out-turned lips which fit in the slots. To hold the pinfrom endwise motion in the link, I prefer to form the eyes of the sidemembers with external laterally recessed portions (1 which may extendall around the eyes and to swage the ends of the tubular pin or to upsetthe same so as to fill said recesses, or as shown in Fig. 4 I may formnotches in the ends of the tubular pin and projections on the exteriorof the side members of the link, which projections when the pins are inplace are hammered down or upset into the notches so as to hold the pinsfrom displacement. In either case the pin is held iirmly in the link.The seam or joint between the opposing edges of the tubular pin issituated on the outer side of the link so that the wearing surfacepresented by the pin is on the unslotted smooth side.

My invention may be modified in form and arrangement, since WVhat Iclaim is A chain comprising a link having a tubular connecting portionat one end, and open at the opposite end, the side members at the openend being thickened at the outer side and formed with openingstherethrough, and a tubular pin extending through the said openings andthrough the tubular connecting portion of the adjacent link, said pinbeing interlocked with and upset in the side members in the thickenedportions thereof to prevent rotation and also endwise movement of thepin the outer ends of the pin being flush with the outer surfaces of theside members substantially as described.

In testimony whereof, I have hereunto set my hand GLEN N G. IIOIVE.

